Neko  0.9.99
A portable framework for high-order spectral element flow simulations
gmres_kernel.h
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1 #ifndef __KRYLOV_GMRES_KERNEL_H__
2 #define __KRYLOV_GMRES_KERNEL_H__
3 /*
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35 */
36 
42 
43 template< typename T >
44 __global__ void gmres_part2_kernel(T * __restrict__ w,
45  T * const * __restrict__ v,
46  const T * __restrict__ mult,
47  const T * __restrict__ h,
48  T * __restrict__ buf_h1,
49  const int j,
50  const int n) {
51 
52  const int idx = blockIdx.x * blockDim.x + threadIdx.x;
53  const int str = blockDim.x * gridDim.x;
54 
55  const unsigned int lane = threadIdx.x % warpSize;
56  const unsigned int wid = threadIdx.x / warpSize;
57 
58  __shared__ T shared[64];
59  T tmp1 = 0.0;
60 
61  for (int i = idx; i < n; i+= str) {
62  T tmp = 0.0;
63  for (int k = 0; k < j; k ++) {
64  tmp += -h[k]*v[k][i];
65  }
66  w[i] += tmp;
67  tmp1 += w[i]*w[i]*mult[i];
68  }
69 
70  tmp1 = reduce_warp<T>(tmp1);
71  if (lane == 0)
72  shared[wid] = tmp1;
73  __syncthreads();
74 
75  tmp1 = (threadIdx.x < blockDim.x / warpSize) ? shared[lane] : 0;
76  if (wid == 0)
77  tmp1 = reduce_warp<T>(tmp1);
78 
79  if (threadIdx.x == 0)
80  buf_h1[blockIdx.x] = tmp1;
81 
82 }
83 
84 
85 
86 #endif // __KRYLOV_GMRES_KERNEL_H__
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ const T *__restrict__ w
const int i
__global__ void T *__restrict__ T *__restrict__ const T *__restrict__ const T *__restrict__ v
const int j
__syncthreads()
__global__ void gmres_part2_kernel(T *__restrict__ w, T *const *__restrict__ v, const T *__restrict__ mult, const T *__restrict__ h, T *__restrict__ buf_h1, const int j, const int n)
Definition: gmres_kernel.h:43